From patchwork Wed Feb 25 19:04:33 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tero Kristo X-Patchwork-Id: 5883181 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 6E4409F691 for ; Wed, 25 Feb 2015 19:26:58 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A891920373 for ; Wed, 25 Feb 2015 19:26:57 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 75FB32021A for ; Wed, 25 Feb 2015 19:26:56 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YQhYJ-0005XM-VY; Wed, 25 Feb 2015 19:23:23 +0000 Received: from arroyo.ext.ti.com ([192.94.94.40]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YQhGt-0006Aj-5N for linux-arm-kernel@lists.infradead.org; Wed, 25 Feb 2015 19:05:24 +0000 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id t1PJ539O012412; Wed, 25 Feb 2015 13:05:03 -0600 Received: from DFLE72.ent.ti.com (dfle72.ent.ti.com [128.247.5.109]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id t1PJ51wg028619; Wed, 25 Feb 2015 13:05:02 -0600 Received: from dlep33.itg.ti.com (157.170.170.75) by DFLE72.ent.ti.com (128.247.5.109) with Microsoft SMTP Server id 14.3.224.2; Wed, 25 Feb 2015 13:05:02 -0600 Received: from localhost.localdomain (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id t1PJ4JoZ007284; Wed, 25 Feb 2015 13:05:00 -0600 From: Tero Kristo To: , , Subject: [PATCHv3 23/35] ARM: OMAP2+: id: cache omap_type value Date: Wed, 25 Feb 2015 21:04:33 +0200 Message-ID: <1424891085-10392-24-git-send-email-t-kristo@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1424891085-10392-1-git-send-email-t-kristo@ti.com> References: <1424891085-10392-1-git-send-email-t-kristo@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150225_110523_343590_97426EEB X-CRM114-Status: GOOD ( 10.22 ) X-Spam-Score: -5.0 (-----) Cc: linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP There is no need to read the register with every invocation of the function, as the value is constant. Thus, cache the value in a static variable. Signed-off-by: Tero Kristo --- arch/arm/mach-omap2/id.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c index 2a2f4d5..1f5949f 100644 --- a/arch/arm/mach-omap2/id.c +++ b/arch/arm/mach-omap2/id.c @@ -52,7 +52,10 @@ EXPORT_SYMBOL(omap_rev); int omap_type(void) { - u32 val = 0; + static u32 val = OMAP2_DEVICETYPE_MASK + 1; + + if (val < OMAP2_DEVICETYPE_MASK) + return val; if (cpu_is_omap24xx()) { val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);